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Magnesite (magnesia) brick
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Magnesite (magnesia), magnesia-spinel, magnesia-zirconium fire-resistant products, having high stability to influence of alkaline steams and slags, used in regenerators of glass-manufacturing furnaces, cement and metallurgical furnaces, used for melting of nonferrous metals, steel-smelting electric furnaces, furnaces with the horizontal grid-iron lattice, fed from the generator and boiler furnaces in zones of contact with alkaline materials.
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Chemical compound and physical parameters
| Data of the chemical analysis |
| The Chemical compound | MZ - 97 | MZ-95 | MZ-92 |
| Al2O3 | - | - | - |
| MgO ≥ (%) | 97 | 95 | 92 |
| SiO2 ≤ (%) | 1.0 | 2.0 | 4.0 |
| ZrO2 ≥ (%) | - | - | - |
| CaO ≤ (%) | 2.0 | 2.0 | 2.5 |
| Physical properties |
| Property | QMZ - 97 | QMZ-95 | QMZ-92 |
| Density gr/cm3 | ≥ 2.95 | ≥ 2.9 | ≥ 2,88 |
| Porosity, % | ? 18 | ≤ 18 | ≤ 18 |
| Limit of strength at compression, MPa | ≥ 60 | ≥ 60 | ≥ 60 |
| Fire resistance under loading °C | ≥ 1700 | ≥ 1650 | ≥ 1600 |
| Linear change at repeated heating, % | 0-0.2 | 0-0.3 | 0-0.5 |
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